I restarted this project. This time I'm able to create my own models and I'm able to map much faster with the power of SketchUp. When I made the first version, I wasn't really experienced and it was off the grid which was the main problem. If this map gets any further than this, I'll probably get some help so that this project won't stop again.

Please be aware that this is a very early version and it won't be that open.